nstall MySQL APT Repository...
If you have installed MySQL this is likely to be in place alreadyhttps://dev.mysql.com/downloads/repo/apt/
sudo dpkg -i /PATH/version-specific-package-name.deb
Install MySQL Workbench...
sudo apt-get update
sudo apt-get install mysql-workbench-community
If you did not setup a root password during MySQL installation then you are likely to need to do this before MYSQL Workbench will work as desired...
alter user 'root'@'localhost' identified with mysql_native_password by 'password';